I use them primarily for metal, including some of the most sick types of it, and I don't have any issues with them, actually I found them quite good with it, especially with progressive metal. Maybe black metal sounds a bit strange, but I think it's due to the fact that BM recordings are far from hi-fi quality, thus the production errors really come forward.
Ditto. No problems on the 598 w/ Korn, Disturbed, Godsmack, Danzig, etc for me. The SS is ideal for classical orchestra but the FR and Prat handles all genres well IMO. If he had been talking about the HD595 that would make sense. The 598 is something completely different yet w/ similar sound sig. Hard to grasp I know.